# PLEXLOG vs KOSTAL PIKO CI

The clearest difference is review sentiment: PLEXLOG at 50% against KOSTAL PIKO CI's 14%. KOSTAL PIKO CI's advantage is iOS requirement (8.0 vs 12.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PLEXLOG ships an update every 3 months, KOSTAL PIKO CI every 2 months. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | PLEXLOG | KOSTAL PIKO CI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **50.0% of reviews** | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 7 MB | 30 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [PLEXLOG GmbH](https://appshunter.io/developer/1435286853) | [KOSTAL Solar Electric GmbH](https://appshunter.io/developer/961587700) |

## What reviewers say

### PLEXLOG

[App page](https://appshunter.io/ios/app/plexlog/id1263926880)

Monitor and manage your photovoltaic systems, storage, and meters easily from your mobile device. Log in with your existing portal credentials to access full functionality on the go.

**Highlights:** PV system monitoring, Storage management, Meter management, Mobile access, Full portal functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### KOSTAL PIKO CI

[App page](https://appshunter.io/ios/app/kostal-piko-ci/id1541448829)

This app allows for the commissioning and configuration of PIKO CI series inverters. It also provides the ability to view real-time performance data of connected devices and update firmware.

**Highlights:** Commission PIKO CI inverters, Configure system-specific functions, View current performance data, Update inverter firmware, Manage network and WLAN settings, Connect Solar Portal

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PLEXLOG free?

PLEXLOG is free to download, with no in-app purchases.

### Is KOSTAL PIKO CI free?

KOSTAL PIKO CI is free to download, with no in-app purchases.

### Do PLEXLOG or KOSTAL PIKO CI have ads?

Neither PLEXLOG nor KOSTAL PIKO CI shows ads.

### Which is updated more often, PLEXLOG or KOSTAL PIKO CI?

PLEXLOG ships an update every 3 months, and KOSTAL PIKO CI every 2 months. Most recently, PLEXLOG was updated on October 24, 2026 and KOSTAL PIKO CI on October 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*